Story about 3 children, the offspring of a mermaid and a human. After they
were born, they were grew up on another planet and they returned to the
Earth in 1985. One of them lost memory in an accident. They also found out
what happened to their clan, and had to save the Earth and the mermaids.

About a sexless robot, Alan, who won't die, won't grow old, and of course
will never be able to reproduce. But it has superior intelligence and
physical power, and also can communicate with animals. Alan suffers a lot
because it lives with human, but it realises it can never live like a
human.

About a robot, Jack, who appears frequently in Shimizu's SF stories. He's
a robot with very human-like psyche. He once believed that he was human
and he can even consume food, unlike many of the other robots of those
times. While performing bounty-hunting duties on a strange planet, he has
a flashback to the time he believes he was human... In this flashback,
he and his partner are imprisoned and are given scarce food everyday. They
share that meager meal, half and half. Yet as the days pass, the delivery
of food becomes more scarce. His partner's strength is waining (she's a
human being), yet Jack, though he feels the same consuming hunger
as his partner, is physically still very apt. They're rescued several
months later, but his partner had already died from starvation. Jack,
who finds out for the first time that he's not human, still lives. {MNI}

Kaguya Hime, ruler of the Kabuchi-jima island, where ten children are
raised as sacrificial beings. Akira, Yui, and Midori escape the island
to live separate lives until the other children who escape with them
begin to mysteriously die. Fearful of death the children return to
Kabuchi-jima in which an event occurs that leaves only 12 survivors
on the island, the 10 children, a military instructor McGee, and Mayu.
Living together while they await rescue, they encounter a series of
strange events. One of the children is a spy! A ploy to recover the
legendary Princess Kaguya's hidden treasure. While a special unit made
up of brilliant hunters are dispatched to the island to kill any
survivors. During the attack, Yui and Akira capture 2 of these hunters
and learn an even bigger secret: all the children from Kabuchi-jima
are clones, created to provide spare parts for the world's famous
people. {019}